Do you know the connecting rod needle roller bearing?

connecting rod needle roller bearing and cage assembly

The connecting rod needle roller bearing and cage assembly is suitable for medium and small internal combustion engines.
Due to its special working environment, needle roller bearings must withstand the impact force from the explosion of the cylinder and the inertial force of the piston, connecting rod, and crankshaft. Therefore, both the needle roller and the cage must bear great centrifugal force and acceleration force. In addition, the bearing is also responsible for the task of heat dissipation, so in the overall design of the bearing, the circulation of lubricating oil should be considered at the same time, and the heat dissipation area should be increased or the outer surface is plated with copper or silver to prevent abnormal wear during the running-in period.

In summary, the characteristics of the connecting rod needle roller bearing cage assembly for connecting rod support are: light weight, reduced inertia force; use of high fatigue resistance, high rigidity, high wear resistance materials; low running friction and high heat dissipation capacity.

KBK connecting rod needle roller bearing and cage assembly for piston pin support (small end bearing)
The needle roller and cage assembly for supporting the piston pin transmits engine power through the piston pin. In order to reduce impact and noise, the inner diameter of the cage is usually close to
The piston pin adopts the inner guiding method. The cage of the needle roller cage assembly for RTL-piston pin support is generally made of 20 steel. High torque, high speed small end
The bearing cage is made of 15CrMo steel.

KZK connecting rod needle roller bearing and cage assembly for crank pin support (big end bearing)
The operation of the crankshaft is driven by the big end of the connecting rod, so the outer diameter of the cage is as close as possible to the inner diameter of the big end of the connecting rod to reduce impact and noise. That is, the external guidance method is adopted. The big-end bearing revolves around the center of the crankshaft and at the same time produces rotation. When the rotation speed is high (above 8000rpm), the centrifugal force will be very large, and the cage will bear a great load at this time, and the working conditions are very bad.

The cage of the needle roller cage assembly for RTL-crankshaft pin support is generally made of 15CrMo steel, and after proper heat treatment, the tensile strength and wear resistance are greatly improved. At the same time, the use of 15CrMo steel is also used to make the crankshaft pins and piston pins of related components the same material, and have the same coefficient of thermal expansion in the same working environment. When the working speed exceeds 8000rpm or the working temperature is high, it is recommended to silver-plated the cage.

Contact: Ellen
Email: [email protected]
Skype: +8618668909563
MP/Whatsapp: +8618668909563
Wechat:18668909563